Vulnerability in atmel_nand_controller_init function in Kernel
Summary
GSD-2022-1002350: mtd: rawnand: atmel: fix refcount issue in atmel_nand_controller_init. Affects Kernel versions >= f88fc122cc34c2545dec9562eaab121494e401ef, < 9843c9c98f26c6ad843260b19bfdaa2598f2ae1e. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that manages communication between software and hardware. It provides essential services and functions for the proper functioning of the system. The atmel_nand_controller_init function is a part of the mtd (Memory Technology Devices) subsystem in the Kernel, specifically designed for Atmel NAND flash controllers. This function initializes the Atmel NAND controller and sets up necessary configurations for NAND flash operations.
Vulnerability Detail
The atmel_nand_controller_init function in the Kernel has a refcount issue, which can lead to potential security vulnerabilities. This issue was introduced in version v4.12 of the Kernel and fixed in version v4.19.238. The refcount issue can result in incorrect handling of reference counts, potentially leading to memory corruption or use-after-free vulnerabilities. An attacker could exploit this vulnerability to execute arbitrary code, escalate privileges, or cause a denial-of-service condition.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If updating the Kernel is not immediately feasible, a possible workaround is to disable the use of the Atmel NAND flash controller or remove the affected driver from the Kernel configuration. This can be achieved by modifying the Kernel configuration file and rebuilding the Kernel without the Atmel NAND flash controller support. However, this workaround may result in the loss of functionality related to the Atmel NAND flash controller.
Conclusion
The atmel_nand_controller_init function in the Kernel has a refcount issue that can lead to potential security vulnerabilities. It is crucial to update the Kernel to version v4.19.238 or later to fix this vulnerability. If immediate update is not possible, consider applying the provided workaround. For further assistance and support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can potentially allow an attacker to execute arbitrary code, escalate privileges, or cause a denial-of-service condition.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Vulert analyzes your manifest file, such as package-lock.json, and provides real-time alerts for open-source vulnerabilities.
Yes, a patch for this vulnerability is available in version v4.19.238 of the Linux Kernel. It is recommended to update the Kernel to this version or later to fix the vulnerability.
At the time of this report, there are no known public exploits specifically targeting this vulnerability. However, it is important to apply the necessary updates and security patches to mitigate potential risks.
While updating the Kernel is the recommended solution, if immediate update is not feasible, you can mitigate the risk by disabling the use of the Atmel NAND flash controller or removing the affected driver from the Kernel configuration. However, this may result in the loss of functionality related to the Atmel NAND flash controller.
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